<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
</body>
<script>
  var arr = [{ label: '男',value: 1 }, { label: '女',value: 0 }]

  function f(arr) {
    // 写代码，得到
    const obj = {}
    arr.forEach(item => {
      obj[item.value] = item.label
    })
    return obj
  }
  var obj = f(arr);
  console.log(obj)
 // obj2 = {'1': '男'， '0': '女'}
</script>

</html>